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【英文标准名称】:StandardPracticeforVerificationofConstantAmplitudeDynamicForcesinanAxialFatigueTestingSystem
【原文标准名称】:轴向疲劳试验系统中恒振幅动态力验证的标准实施规范
【标准号】:ASTME467-1998a(2004)
【标准状态】:现行
【国别】:
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E08.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:金属;工艺;机械试验;验证;负荷;疲劳试验;波幅;试验;质量
【英文主题词】:Constant-load-amplitudefatiguecrackgrowthrates;Fatigue;Verification;verificationofconstantamplitudedynamicloadsinaxialloadfatigue;testingmachine,practice
【摘要】:1.1Thispracticecoversproceduresforthedynamicverificationofcyclicforceamplitudemeasurementaccuracyduringconstantamplitudetestinginanaxialfatiguetestingsystem.Itisbasedonthepremisethatforceverificationcanbedonewiththeuseofastraingagedelasticelement.Useofthispracticegivesassurancethattheaccuraciesofdynamicforcereadingsfromthetestmachine,atthetimeofthetest,afteranyuserappliedcorrectionfactors,fallwithinthelimitsrecommendedinSection9.ItdoesnotaddressstaticaccuracywhichmustfirstbeaddressedusingPracticesE4orequivalent.1.2Verificationisspecifictoaparticulartestmachineconfigurationandspecimen.Thisstandardisrecommendedtobeusedforeachconfigurationoftestingmachineandspecimen.WheredynamiccorrectionfactorsaretobeappliedtotestmachineforcereadingsinordertomeettheaccuracyrecommendedinSection9,theverificationisalsospecifictothecorrectionprocessused.Finally,ifthecorrectionprocessistriggeredand/orperformedbyaperson,thentheverificationisspecifictothatindividualaswell.1.3Itisrecognizedthatperformanceofafullverificationforeachconfigurationoftestingmachineandspecimenconfigurationcouldbeprohibitivelytimeconsumingand/orexpensive.AnnexA1providesmethodsforestimatingthedynamicaccuracyimpactoftestmachineandspecimenconfigurationchangesthatmayoccurbetweenfullverifications.Wheretestmachinedynamicaccuracyisinfluencedbyaperson,estimatingthedynamicaccuracyimpactofallindividualsinvolvedinthecorrectionprocessisrecommended.Thispracticedoesnotspecifyhowthatassessmentwillbedoneduetothestrongdependenceonowner/operatorsofthetestmachine.1.4Thispracticeisintendedtobeusedperiodically.Consistentresultsbetweenverificationsisexpected.Failuretoobtainconsistentresultsbetweenverificationsusingthesamemachineconfigurationimpliesuncertainaccuracyfordynamictestsperformedduringthattimeperiod.1.5Thispracticeaddressestheaccuracyofthetestingmachine'sindicatedforcesascomparedtoadynamometer'sindicateddynamicforces.Forthepurposesofthisverification,thedynamometer'sindicateddynamicforceswillbeconsideredthetrueforces.Phaselagbetweendynamometerandforcetransducerindicatedforcesisnotwithinthescopeofthispractice.1.6TheresultsofeithertheAnnexA1calculationorthefullexperimentalverificationmustbereportedperSection10ofthisstandard.1.7Thisstandarddoesnotaddresstheissueofatestmachine'scontrolaccuracy.Itdoesnotprovideassurancethattheforceobtainedequalstheforcecommandedwithinthespecifiedaccuracy.Thecorrelationbeingverifiedisbetweenthetestmachine'sindicatedforceandthetrueforceonthetestspecimenasmeasuredbyadynamometer.1.8Thispracticeprovidesnoassurancethattheshapeoftheactualwaveformconformstotheintendedwaveformwithinanyspecifiedtolerance.1.9Thisstandardisprincipallyfocusedatroomtemperatureoperation.Itisbelievedthereareadditionalissuesthatmustbeaddressedwhentestingathightemperatures.Atthepresenttime,thisstandardpracticemustbeviewedasonlyapartialsolutionforhightemperaturetesting.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:10P.;A4
【正文语种】:


Product Code:SAE AS85049/124
Title:Connector Accessories, Electrical, Strain Relief, Straight Self-Locking, Category 4c (For Mil-Dtl-38999 Series Iii and Iv Connectors
Issuing Committee:Ae-8c1 Connectors Committee
Scope:Amendment 3 of AS85049/124A.